Hello guys, after a few weeks seeing the nice projects performed in this forum I decided to start to build my first amp with the MyRef FE. I got the schematics (v1.7) from the drive and I'm trying to understand every circuit's component. In the Original MyRef there was a technical document explaining most of the building blocks, but I haven't been able to find in MyRef FE, and there are some differences from the original design. I think that going through hundred of pages of the post is far from optimized. So, is there any document like that?

In the Original MyRef there was a technical document explaining most of the building blocks, but I haven't been able to find in MyRef FE, and there are some differences from the original design. I think that going through hundred of pages of the post is far from optimized. So, is there any document like that?

AFAIK there isn't any specific document like that... but conceptually there are basically no differences. There are only a few improvements, mostly inspired by Mauro's "My Evolution" amplifier.

The main difference are:

1) the power supply for the first stage, which on the original MyRef was just a simple resistor+Zener while on the FE there is a CCS + a more elaborated shunt regulator (see the PSU block on the top-left of the FE schematic);

2) the internal limiter network (those Zeners between the first stage and the current pump), for better clipping control.

Another (obvious) difference WRT to the original MyRef (but not WRT some other implementation, such as the one by TP) is the full "dual-mono" configuration of the FE (the original MyRef was configured as a stereo amp on a single board, with some ancillary parts in common for both channels).

There are also some minor differences in the compensation networks.

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